My room is basically 14 X 15 though it is open to the back with a dining room and to the right with a foyer. Yes I will be getting a sub, SVS to be precise. That is one thing I'm sure of so far. Oh and towers over bookshelves.
I will be listening to music 90%. Though with the addition of subs and rear channel and excellent sound movies may take a higher precedence. I don't watch TV much at all the news and adult cartoons, The Simpson's, Family Guy, South Park, American Dad.
Thanks Dono